Problem syncing tasks after completing task(s) offline?

With the iPod being a "not always online" device, like the iPhone, many tasks are flagged completed offline then synced online when possible - at least once a day.

The sync usually works as expected but there are times when the task (usually a repeating task, eg. daily or monthly) does not update online and refuses to show in the app until the online task is flagged as complete and the app is re-synced.